From: "Larry Hall (Cygwin)" <reply-to-list-only-lh@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: bad performance when opening many files on Win7
Date: Fri, 27 Apr 2012 03:19:00 -0000 [thread overview]
Message-ID: <4F9A0FFB.4080201@cygwin.com> (raw)
In-Reply-To: <874ns6z0cr.fsf@Rainer.invalid>
On 4/26/2012 4:47 PM, Achim Gratz wrote:
>
> I've seen major performance regressions on Win7 compared to an pre-1.7
> Cygwin version on Win2000. I had initially suspected the virus scanner
> and disabling the real-time scan for the whole Cygwin folder did improve
> things appreciably. However the real performance hit when an
> application opens or even just stats many files in succession (like Perl
> is prone to at startup when it scans @INC) is still there.
>
> Superficially it looks like you get 100% load on one CPU and the
> application is busy, but perfmon tells you that the application sits on
> its thumbs and the CPU is eaten by lsass.exe (which doesn't have any
> file open or any network connection). Eventually the application starts
> doing what it is supposed to do, but lsass continues to eat CPU for a
> few minutes. I'm not even sure there's if it only happens for Cygwin
> applications, but for those I can reliably reproduce it. When I time
> the application in Cygwin, I get something like less than a second user
> time and over two minutes core time.
>
> If someone has seen something like that and maybe there is some setup
> that I can tweak to avoid this it would be great to know.
Here's some background.
<http://www.suacommunity.com/forum/tm.aspx?m=1697&mpage=1>
Anything there describe your setup?
--
Larry
_____________________________________________________________________
A: Yes.
> Q: Are you sure?
>> A: Because it reverses the logical flow of conversation.
>>> Q: Why is top posting annoying in email?
--
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next prev parent reply other threads:[~2012-04-27 3:19 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-26 20:48 Achim Gratz
2012-04-27 3:19 ` Larry Hall (Cygwin) [this message]
2012-04-27 5:55 ` Achim Gratz
2012-04-27 8:42 ` Achim Gratz
2012-04-30 15:37 ` Larry Hall (Cygwin)
2012-05-08 13:19 ` Achim Gratz
2012-05-08 13:54 ` Achim Gratz
2012-05-08 13:56 ` Corinna Vinschen
2012-05-08 16:38 ` Achim Gratz
2012-05-08 17:29 ` Corinna Vinschen
2012-05-09 6:57 ` Achim Gratz
2012-05-09 18:17 ` Corinna Vinschen
2012-05-09 18:39 ` Achim Gratz
2012-06-26 16:37 ` Achim Gratz
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